A Practical Guide to Advanced Topical Drug Delivery Systems in Dermatology

Dermatological diseases such as atopic dermatitis, acne, and psoriasis result in significant morbidity and decreased quality of life. The first line of treatment for such diseases is often topical medications. While topical delivery allows active drug to be delivered directly to the target site, the skin is a virtually impermeable barrier that impedes delivery of large molecules. Thus, the formulation and delivery system are integral elements of topical medications. Patients also have preferences for the properties of topical formulations and these preferences can positively or negatively impact adherence. Therefore, the choice of topical formulation is a key consideration. Recent developments in drug delivery systems have produced enhanced topical treatments that improve efficacy, safety, and patient acceptability. Awareness of the delivery system in which drugs are formulated is critical as this can have profound implications on treatment success. This paper provides an overview and clinical commentary on advances in topical delivery systems and their impact on dermatological practice.